A European transportation agency collected data on 10 major airports.

Question

A European transportation agency collected data on 10 major airports. The table records the year each airport was first opened, the year it was most recently renovated, and annual flight volumes.

Airport 
 Country 
 Year opened 
 Most recent renovation 
 International flights 
 Domestic flights 
 Total flights 
 
  Berlin Central 
 Germany 
 1960 
 2019 
 210000 
 48000 
 258000 
 
  Madrid Norte 
 Spain 
 1928 
 2018 
 185000 
 67000 
 252000 
 
  Helsinki West 
 Finland 
 2001 
 2016 
 142000 
 21000 
 163000 
 
  Paris Est 
 France 
 1934 
 2020 
 225000 
 53000 
 278000 
 
  Rome Sud 
 Italy 
 1965 
 2014 
 198000 
 61000 
 259000 
 
  Warsaw Hub 
 Poland 
 1970 
 2017 
 133000 
 44000 
 177000 
 
  Vienna Nord 
 Austria 
 1912 
 2015 
 157000 
 29000 
 186000 
 
  Zurich Alpen 
 Switzerland 
 1954 
 2019 
 168000 
 37000 
 205000 
 
  Lisbon Aero 
 Portugal 
 1980 
 2013 
 121000 
 42000 
 163000 
 
  Oslo Fjord 
 Norway 
 1948 
 2012 
 149000 
 25000 
 174000

For each of the following statements, select  True  if it is correct based on the table. Otherwise select  False.

Bunuel · Accepted Answer

• Among the airports that opened before 1960, the average number of international flights is greater than the average number of international flights at airports that opened in or after 1960.

There are five airports that opened before 1960 and five that opened in 1960 or later. Since the counts are equal, comparing the averages is the same as comparing the sums of international flights.

The total for the five before 1960 is 185,000 + 225,000 + 157,000 + 168,000 + 149,000 = 884,000.

The total for the five in 1960 or later is 210,000 + 198,000 + 133,000 + 142,000 + 121,000 = 804,000.

Because 884,000 is greater than 804,000, the average for airports opened before 1960 is greater.

Answer:  True

• Every airport with fewer than 40,000 domestic flights has at least 140,000 international flights.

Domestic flights fewer than 40,000: Vienna (29,000; 157,000 international), Zurich (37,000; 168,000 international), Oslo (25,000; 149,000 international), Helsinki (21,000; 142,000 international).

All have at least 140,000 international.

Answer:  True

• The median number of international flights among airports opened before 1960 is greater than the median number of international flights among airports opened in or after 1960.

Before 1960 international flights: Madrid 185,000; Paris 225,000; Vienna 157,000; Zurich 168,000; Oslo 149,000. Ordered: 149,000, 157,000, 168,000, 185,000, 225,000. Median = 168,000.

1960 or later international flights: Berlin 210,000; Rome 198,000; Warsaw 133,000; Helsinki 142,000; Lisbon 121,000. Ordered: 121,000, 133,000, 142,000, 198,000, 210,000. Median = 142,000.

168,000 > 142,000, so the statement is correct.

Answer:  True

I29-110

crimson_king · Answer

True, True, True

RenukaKhope · Answer

1. True
 Average of the flights before 1960s is 176800 (185000, 225000, 157000, 168000, 149000)
 Average of the flights on or after 1960s is 160800 (210000,142000,198000,133000,121000)
 Therefore true.

2. True
 Domestic Flights with less than 40,000 flights = 21000,29000,37000,25000
 International flights for respective domestic flights = 142000,157000,168000,149000
 Therefore true.

3. True
 Median for international flights for airports opened before 1960s = 168000
 Median for international flights for airports opened on or after 1960s = 142000
 Therefore true.

Dereno · Answer

Question 1:

Among the airports that opened before 1960, the average number of international flights is greater than the average number of international flights at airports that opened in or after 1960.

If we sort the table with the year of opening, we find the list of airports opened before 1960:

Vienna Nord, Madrid Norte, Paris Est, Oslo Fjord, and Zurich Alpen.

Average = (157000+ 185000 + 225000 + 149000 + 168000) / 5 =  176800 .

And these list corresponds to the airports opened on or after 1960.

Berlin Central, Rome Sud, Warsaw Hub, Lisbon Aero, and Helsinki West.

Average = ( 210000 + 198000+ 133000 + 121000 + 142000)/5 =  160800.

Hence, YES.

QUESTION 2:

Every airport with fewer than 40,000 domestic flights has at least 140,000 international flights.

The airports with fewer than 40,000 domestic flights and their corresponding international flights are as follows:

Helsinki West: 21,000 domestic flights, 142,000 international flights.

Oslo Fjord: 25,000 domestic flights, 149,000 international flights.

Vienna Nord: 29,000 domestic flights, 157,000 international flights.

Zurich Alpen: 37,000 domestic flights, 168,000 international flights.

so, the number of international flights is atleast 140,000.

Hence, YES.

QUESTION 3:

The median number of international flights among airports opened before 1960 is greater than the median number of international flights among airports opened in or after 1960.

We already know from question1, the airports which are opened before 1960 and opened on or after 1960. The median international flights for both the cases are:

Airport opened before 1960: The international flight numbers are 157,000, 185,000, 225,000, 149,000, and 168,000. MEDIAN value = 168000.

Airport opened on or after 1960: The international flight numbers are 210,000, 198,000, 133,000, 121,000, and 142,000. MEDIAN value = 142000.

Clearly, the median value before 1960 is GREATER than median value on or after 1960.  Hence, YES.

Souradeep17 · Answer

The answer should be 
1. True
2. True
3. True

question 1:
 Among the airports that opened before 1960, the average number of international flights is greater than the average number of international flights at airports that opened in or after 1960.  
 : sort by year opened field.  
 Now simply take the average of all the airports before 1964 it is coming to 1094000 /6=1,82,333.3333333333

Now for airports after 1964 the average is coming as : 594000÷4 =148500 so yes 1964 old airports> new airports

Option 2:  
 Every airport with fewer than 40,000 domestic flights has at least 140,000 international flights.  
 This is straight forward : , sort by domestic flights and check till 40000 flights all have internation flights more than 1,40,000.

Option 3 :  
 The median number of international flights among airports opened before 1960 is greater than the median number of international flights among airports opened in or after 1960.  
 The median for older than 1964 airports are : (168000 + 185000)/2=1,76,500

for newer than 64 airports : (133000+ 142000)/2= it will be less than 1,76,500 for sure. Hence this is true.

mayankkamal999 · Answer

1. 
I used calculator for this to quickly sum international flights 
Before 1960 = 157+185+225+149+168 = 884
In or after 1960 = 210+198+133+121+142 = 804
Since both "before 1960" and "In or after 1960" have 5 data points the one with greater sum would have more average i.e. Before 1960 has more average
Hence  TRUE

2.
 Airport with fewer than 40,000 domestic flights: Helsinki West, Oslo Fjord, Vienna Nord and Zurich Alpen all have greater than 140K International Flights 
 Hence  TRUE

3.  
 International flights among airports opened before 1960 in ascending order: 149, 157,  168 , 185, 225 
 So median is 168 
 International flights among airports opened In or After 1960 in ascending order: 121, 133,  142 , 198, 210 
 So median is 142 
 So Median of Before 1960> Median of In or after 1960 
 Hence  TRUE

A European transportation agency collected data on 10 major airports.

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Airport	Country	Year opened	Most recent renovation	International flights	Domestic flights	Total flights
Berlin Central	Germany	1960	2019	210000	48000	258000
Madrid Norte	Spain	1928	2018	185000	67000	252000
Helsinki West	Finland	2001	2016	142000	21000	163000
Paris Est	France	1934	2020	225000	53000	278000
Rome Sud	Italy	1965	2014	198000	61000	259000
Warsaw Hub	Poland	1970	2017	133000	44000	177000
Vienna Nord	Austria	1912	2015	157000	29000	186000
Zurich Alpen	Switzerland	1954	2019	168000	37000	205000
Lisbon Aero	Portugal	1980	2013	121000	42000	163000
Oslo Fjord	Norway	1948	2012	149000	25000	174000

True	False
		Among the airports that opened before 1960, the average number of international flights is greater than the average number of international flights at airports that opened in or after 1960.
		Every airport with fewer than 40,000 domestic flights has at least 140,000 international flights.
		The median number of international flights among airports opened before 1960 is greater than the median number of international flights among airports opened in or after 1960.

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A European transportation agency collected data on 10 major airports.

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